linux-kernel - [PATCH 5.5 146/151] iommu/vt-d: Fix the wrong printing in RHSA parsing

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Message-Id: <20200317103337.160117071@linuxfoundation.org>
Date:   Tue, 17 Mar 2020 11:55:56 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Lu Baolu <baolu.lu@...ux.intel.com>,
        Zhenzhong Duan <zhenzhong.duan@...il.com>,
        Joerg Roedel <jroedel@...e.de>
Subject: [PATCH 5.5 146/151] iommu/vt-d: Fix the wrong printing in RHSA parsing

From: Zhenzhong Duan <zhenzhong.duan@...il.com>

commit b0bb0c22c4db623f2e7b1a471596fbf1c22c6dc5 upstream.

When base address in RHSA structure doesn't match base address in
each DRHD structure, the base address in last DRHD is printed out.

This doesn't make sense when there are multiple DRHD units, fix it
by printing the buggy RHSA's base address.

Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@...il.com>
Fixes: fd0c8894893cb ("intel-iommu: Set a more specific taint flag for invalid BIOS DMAR tables")
Signed-off-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/iommu/dmar.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -475,7 +475,7 @@ static int dmar_parse_one_rhsa(struct ac
 	pr_warn(FW_BUG
 		"Your BIOS is broken; RHSA refers to non-existent DMAR unit at %llx\n"
 		"BIOS vendor: %s; Ver: %s; Product Version: %s\n",
-		drhd->reg_base_addr,
+		rhsa->base_address,
 		dmi_get_system_info(DMI_BIOS_VENDOR),
 		dmi_get_system_info(DMI_BIOS_VERSION),
 		dmi_get_system_info(DMI_PRODUCT_VERSION));